1.

53例患者的一般特征

Demographic characteristics of the study population

	Total (n=53)	Second-line (n=28)	Third- or further-line (n=25)	P
PS: performance status
Gender				0.77
Male	35	19	16
Female	18	9	9
Age				0.79
Range	33-79	41-78	33-72
Median	62	62	61
< 65	37	20	17
≥65	16	8	8
Staging				0.51
Ⅲb	7	5	2
Ⅳ	46	23	23
PS				0.84
0-1	43	23	20
2	10	5	5
Histology				0.32
Adenocarcinoma	39	19	20
Non-adenocarcinoma	14	9	5
Smoking history				0.86
Yes	24	13	11
No	29	15	14